Not all psychopaths are locked up in prison for committing crimes. Many are still out there in the community. Often one comes across a person who seems strange and does not respond to normal social cues. Psychopaths have no empathy with others, so one does nothing and can do nothing until a crime is committed.

The "disease" is now thought to be genetic. Psychopaths will soon be able to be identified by a DNA test. It is possible that in the future all criminals will be tested. What to do with them after they are identified will be a major problem for society. Are they to be locked up for a longer time, or will they go to an institution where they will be given medication and psychiatric treatment?

It could be some time before medical knowledge reaches the point where the "bad" genes can be silenced or eliminated. Furthermore, having some psychopaths in society may be an evolutionary imperative. Most of these people do not know if another person is angry or afraid. This is the basis of the odd behavior, but many are highly intelligent. Two per cent of the population are psychopaths and not all of them commit crimes. However, a genetic basis is proven with records of ancestors having problems fitting into society.